content: /*
   * Copyright 2016 David Karnok
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package hu.akarnokd.agera;
  
  import android.support.annotation.NonNull;
  
  import com.google.android.agera.Observable;
  import com.google.android.agera.Updatable;
  
  /**
   * An Agera that has a source Observable and the only add/remove behavior is to
   * subscribe the custom Updatable wrapper created.
   */
  abstract class AgeraSource<U extends Updatable> extends AgeraTracking<U> {
      protected final Observable source;
  
      AgeraSource(@NonNull Observable source) {
          this.source = source;
      }
  
  
      @Override
      protected final void onAdd(@NonNull Updatable updatable, @NonNull U wrapper) {
          source.addUpdatable(wrapper);
      }
  
      @Override
      protected final void onRemove(@NonNull Updatable updatable, @NonNull U wrapper) {
          source.removeUpdatable(wrapper);
      }
  }
  